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Selective breeding (also called artificial selection) is the process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits (characteristics) by choosing which typically animal or plant males and females will sexually reproduce and have offspring together.
A 1930s exhibit by the Eugenics Society.Some of the signs read "Healthy and Unhealthy Families", "Heredity as the Basis of Efficiency" and "Marry Wisely".Eugenics (/ j uː ˈ dʒ ɛ n ɪ k s / yoo-JEN-iks; from Ancient Greek εύ̃ (eû) ' good, well ' and -γενής (genḗs) ' born, come into being, growing/grown ') [1] is a set of beliefs and practices that aim to improve the genetic ...
Inbreeding is a technique used in selective breeding. For example, in livestock breeding , breeders may use inbreeding when trying to establish a new and desirable trait in the stock and for producing distinct families within a breed, but will need to watch for undesirable characteristics in offspring, which can then be eliminated through ...
U.S. eugenics poster advocating for the removal of genetic "defectives" such as the insane, "feeble-minded" and criminals, and supporting the selective breeding of "high-grade" individuals, c. 1926 In the Deep South , women's associations played an important role in rallying support for eugenic legal reform.
Plato's political philosophy included the belief that human reproduction should be cautiously monitored and controlled by the state. [10] He advocated that selective breeding should be applied to both humans and animals. Plato recognized that this form of government control would not be readily accepted, and proposed the truth be concealed from ...
This has shaped human evolution for many years, but reasons why humans choose their mates are not fully understood. Sexual selection is quite different in non-human animals than humans as they feel more of the evolutionary pressures to reproduce and can easily reject a mate. [ 2 ]
Culling is: ... the rejection or removal of inferior individuals from breeding. The act of selective breeding. As used in the practice of breeding pedigree cats, this refers to the practice of spaying or neutering a kitten or cat that does not measure up to the show standard (or other standard being applied) for that breed.
Harnessing racial hygiene as a justification, the scientists used prisoners from Auschwitz and other concentration camps as test subjects for their human experiments. [2] Theories on racial hygiene led to an elaborate sterilization program, with the goal of eliminating what the Nazis regarded as diseases harmful to the human race.